Discovery, R&D, Chr. Hansen A/S, 10-12 Boege Allé, DK2970, Hoersholm, Denmark.
FEMS Microbiol Lett. 2020 Nov 5;367(20). doi: 10.1093/femsle/fnaa179.
Synthesis of polysaccharides by Leuconostoc can result in improved texture of fermented products. A total of 249 Leuconostoc strains were screened for homo-polysaccharide production and for texturing capabilities in milk. A total of six Ln. mesenteroides strains with superior texturing properties had the genetic blueprint for both homo- (HoPS) and hetero-polysaccharide (HePS) synthesis. Only one strain produced texture in milk without added sucrose, suggesting HePS synthesis via the Wzy dependent pathway. In milk acidification experiments with added sucrose, all six strains depleted the sucrose and released fructose. Thus, they can be used for both texture and possibly also for sweetness enhancement.
肠膜明串珠菌可以通过合成多糖来改善发酵产品的质地。我们总共筛选了 249 株肠膜明串珠菌，以筛选出具有同型多糖生产能力和在牛奶中具有质地形成能力的菌株。共有 6 株具有优良质地形成特性的肠膜明串珠菌株具有合成同型 (HoPS) 和杂多糖 (HePS) 的遗传蓝图。只有一株在没有添加蔗糖的牛奶中产生质地，表明通过 Wzy 依赖途径合成 HePS。在添加蔗糖的牛奶酸化实验中，所有 6 株菌都消耗了蔗糖并释放了果糖。因此，它们既可以用于质地形成，也可以用于增强甜味。
